Brick-kiln



I T. GAMON.

BRICK KILN.

No. 445,595. Patented Feb. 3, 1891.

AH I I n l umumu [i k UNITED STATES PATENT OFFICE.

THOMAS GAMON, OF PHILADELPHIA, PENNSYLVANIA.

BRICK- KILN.

SPECIFICATION forming part of Letters Patent No. 445,595, dated February3, 1891.

Application filed May 9, 1890- To all whom it may concern:

Be it known that I, THOMAS GAMON, a citizen of the United States,residing at 1629 Christian street, in the city of Philadelphia, State ofPennsylvania, have invented certain new and useful Improvements in Roofsof Brick-Kilns or other Similar Structures, of which the following is aspecification, reference being had to the accompanying drawmgs.

My invention relates to an improvement in roofs of brick-kilns or othersimilar structures in which an arch of fire or other brick operates inconnection with curved wroughtiron ribbed girders, called continuous T-bars angle-irons, to prevent the sides of the roof from expanding.

The objects of my improvement are, first, to render the roof of the kilnor other similar structure capable of withstanding an unlimited amountof heat for a long period of time; second, to prevent the curved sidesof the roof expanding in any appreciable degree and to allow the crownof the roof to expand within certain limits; third, to prevent the rooffrom collapsing when highly heated by allowing a limited expansion ofthe crown and preventing expansion of the sides. I attain these objectsby the mechanism illustrated in the accompanying drawings, in which-Figure l is a transverse vertical section of the kiln and roof. Fig. 2is a side elevation of the same; and Fig.3 is a detail view showing thegirder, shoe, and knee in their proper relative positions.

The arch a, of fire or other brick, is built upon an ordinary brick-kilnor similar structure, the brick arch beginning at A and B. Outside ofthe brick arch, upon the top of the outside wall I) of the kiln, atintervals are set the iron shoes 0 or other suitable irons, the uprightpart of the shoe or iron being nearest to and parallel with the outerface of the side of the kiln. Upon the cast-iron shoes or other ironsare set the base ends of the continuous T-bars, angle-irons, or otherribbed irons d, the outside face of the web of such iron being broughtin contact with and resting against the upright part of the shoe. Thecontinuous T-bars, angle-irons, or other ribbed girders encircle thebrick arch, the inside face of such iron fitting closely to the outsideface of Serial No. 351,184. (No model.)

irons, or other ribbed girders being ridged sufliciently high and broadto fit closely to the under face of suchT-bar, angle-iron, or otherribbed girder. Between these pointsG and D a space 6 is left between theoutside face of the brick arch and the under face of the T-bar,angle-iron, or other ribbed iron to allow for the expansion of the crownof the brick arch when heated during the burning or other heatingprocess, the sides of the brick arch between A and O, and Band D beingprevented by the T-bars, angle irons, or other ribbed girders fromrising in any considerable degree. The T-bars, angle-irons, or otherribbed girders encircle the brick arch at intervals along the entiregirth of the arch, the base ends resting upon independent shoes or othersuitable irons. The web of the T-bars, angle-irons, or other ribbedirons at E and F is bolted to the bottom of the shoe or other suitableiron at G and H by means of the wrought-iron knee f at L and M. Afterthe brick arch is built and the T-bars, angle-irons, or other ribbedirons are set and bolted, as above described, the sides of the kiln orsimilarstructure are continued up and built around and upon thecast-iron shoes or other suitable appliance which may be used and kneeand base ends of the T-bars, angle-irons, or other ribbed girders toprevent shifting or rising either verticallyor laterally. During the burning or other heating process the roof tends to expand. The T-bars,angle-irons, or other ribbed irons lying close to the face of the brickarch for the distance of about one-third on each side has the effect ofpreventing but slight expansion there. Between these points, from O toD, the crown of the brick arch may expand until it reaches the underface of the girders, when further rising is prevented, and the wholeroof, being curved, admits of this much play without collapsing orinjury.

What I claim as my invention, and desire to secure by Letters Patent,is-

1. In a roof for a brick-kiln or other similar structure, thecombination of a curved arch of brick and curved metal girders clasp- 3.The combination of the kiln having an arched roof, the shoe secured inthe side walls of the kiln, the knees secured to the said sho s. 15 andthe arched girders extending over the roof of the kiln and having theirends secured to the knees, as set forth.

THOMAS GAMON.

Witnesses:

FRANCIS S. LAWS, EDW. C. NEVIN.

